Prudential Calibration and Regulatory Infrastructure in Emerging Islamic Banking Systems: Evidence and Policy Implications from Sub-Saharan Africa
Abstract
This study addresses the prudential calibration challenge in emerging Islamic banking systems by examining whether prevailing capital, liquidity, and governance thresholds are proportionately aligned with operational productivity. Focusing on Sub-Saharan Africa (SSA), it reframes financial soundness indicators as regulatory design variables rather than isolated performance determinants.
The study employs a bias-corrected two-stage Data Envelopment Analysis (DEA) on a balanced panel of 35 fully fledged Islamic banks in SSA over the period 2010–2024. Efficiency scores are estimated under variable returns to scale and subsequently analysed using truncated regression against CAMELS-based prudential indicators. The findings are interpreted through a regulatory calibration framework grounded in efficiency–stability trade-off theory.
Results reveal persistent inefficiencies primarily driven by scale constraints rather than managerial deficiencies. Capital adequacy does not exhibit proportional efficiency gains, liquidity strength shows only modest productivity alignment, and asset quality demonstrates a more consistent association with operational performance. The evidence suggests that mechanical prudential reinforcement in structurally shallow markets may yield diminishing productivity returns.
The study proposes a proportional prudential calibration approach integrating capital design, liquidity infrastructure development, and governance strengthening to align stability objectives with productive intermediation better.
This paper advances Islamic banking research by positioning operational efficiency as a regulatory diagnostic tool and introducing an empirically grounded prudential calibration framework for emerging financial systems.
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Addou, K. I., Boulanouar, Z., Anwer, Z., Bensghir, A., & Ramadilli Mohammad, S. M. (2024). The impact of Basel III regulations on solvency and credit risk-taking behavior of Islamic banks. International Journal of Islamic and Middle Eastern Finance and Management, 17(5), 915–935. https://doi.org/10.1108/IMEFM-05-2024-0248
Akinbowale, O. E., Zerihun, M. F., & Mashigo, P. (2025). Banking and financial regulation in Sub-Saharan Africa: a systematic literature review and multiple regression approach. Journal of Financial Regulation and Compliance, 33(3), 359–385. https://doi.org/10.1108/jfrc-09-2024-0170
Al-Harbi, A. (2020). Determinates of Islamic banks liquidity. Journal of Islamic Accounting and Business Research, 11(8), 1619–1632. https://doi.org/10.1108/JIABR-08-2016-0096
Alabbad, A., Anantharaman, D., & Govindaraj, S. (2020). Depositor Characteristics and the Performance of Islamic Banks. Journal of Accounting Auditing & Finance, 36(3), 643–666. https://doi.org/10.1177/0148558x20916338
Ali, U., Hussain, K., & Sheikh, R. (2023). Performance Analysis of Islamic Banking in Pakistan Using DEA Technical Efficiency and Maqasid-e-Shariah Index. Journal of Islamic Business and Management (JIBM), 13(01), 56–70. https://doi.org/10.26501/jibm/2023.1301-004
Asutay, M., Ayturk, Y., & Aksak, E. (2020). The effects of regulation and supervision on the risk-taking behaviour of Islamic banks. Journal of Islamic Accounting and Business Research, 11(10), 1953–1967. https://doi.org/10.1108/JIABR-12-2019-0222
Athari, S. A. (2021). The Impact of External Governance and Regulatory Settings on the Profitability of Islamic Banks: Evidence from Arab Markets. SSRN Electronic Journal. https://doi.org/10.2139/ssrn.3782745
El-Halaby, S., Albarrak, H., & Grassa, R. (2020). Influence of adoption AAOIFI accounting standards on earning management: evidence from Islamic banks. Journal of Islamic Accounting and Business Research, 11(10), 1847–1870. https://doi.org/10.1108/JIABR-10-2019-0201
Farooq, M. O., Miah, M. D., Kabir, M. N., & Hassan, M. K. (2023). The impact of banks’ capital buffer on equity return: evidence from Islamic and conventional banks of GCC countries. Journal of Islamic Accounting and Business Research, 16(1), 188–217. https://doi.org/10.1108/JIABR-08-2022-0218
Gondwe, S., Gwatidzo, T., & Mahonye, N. (2022). Bank regulation and risk-taking in sub-Sahara Africa. Journal of Financial Regulation and Compliance. https://doi.org/10.1108/jfrc-12-2021-0104
Gondwe, S., Gwatidzo, T., & Mahonye, N. (2024). Cross-border banking and bank stability: evidence from Sub-Saharan Africa. Journal of Banking Regulation. https://doi.org/10.1057/s41261-024-00254-x
Istaiteyeh, R. (2024). Efficiency Assessment and Determinants of Performance: A Study of Jordan’s Banks Using DEA and Tobit Regression. Economies, 12(2), 37. https://doi.org/10.3390/economies12020037
Kateb, F. E., Boulila Taktak, N., & Hassan, M. K. (2025). AAOIFI standards and income smoothing perspective in Islamic financial institutions (IFIs): a study of the MENA region. Journal of Islamic Accounting and Business Research, 1–17. https://doi.org/10.1108/JIABR-12-2022-0350
Kateb, I., Nafti, O., & Zeddini, A. (2023). How to improve the financial performance of Islamic banks in the MENA region? A Shariah governance perspective. International Journal of Emerging Markets, 20(6), 2559–2580. https://doi.org/10.1108/ijoem-03-2023-0434
Korbi, F., & Bougatef, K. (2017). Regulatory capital and stability of Islamic and conventional banks. International Journal of Islamic and Middle Eastern Finance and Management, 10(3), 312–330. https://doi.org/10.1108/IMEFM-06-2016-0079
Korein, S., Abotalib, A. M., Trojak, M., & Abou‐El‐Sood, H. (2021). Is Capital Conservation Buffer or Regulatory Leverage Better at Improving Bank Efficiency? The Case of an Emerging Market. Journal of Humanities and Applied Social Sciences, 4(4), 292–309. https://doi.org/10.1108/jhass-10-2020-0186
Korein, S., Abotalib, A., Trojak, M., & Abou-El-Sood, H. (2022). Is capital conservation buffer or regulatory leverage better at improving bank efficiency? The case of an emerging market. Journal of Humanities and Applied Social Sciences, 4(4), 292–309. https://doi.org/10.1108/JHASS-10-2020-0186
Kozyuk, V., & Baranchuk, V. (2022). The Essence of Global Financial Crises and Opportunities to Prevent Them. Innovation and Sustainability, 1, 44–52. https://doi.org/10.31649/ins.2022.1.44.52
Mateev, M., Moudud-Ul-Huq, S., & Sahyouni, A. (2021). Regulation, banking competition and risk-taking behavior in the MENA region: policy implications for Islamic banks. Journal of Islamic Accounting and Business Research, 13(2), 297–337. https://doi.org/10.1108/JIABR-01-2021-0009
Mateev, M., & Nasr, T. (2023). Banking system stability in the MENA region: the impact of market power and capital requirements on banks’ risk-taking behavior. International Journal of Islamic and Middle Eastern Finance and Management, 16(6), 1107–1140. https://doi.org/10.1108/imefm-05-2022-0198
Mathuva, D. M. (2025). Asset quality, earnings management and bank stability under IFRS 9: a cross-country examination. Journal of Applied Accounting Research, 1–28. https://doi.org/10.1108/JAAR-11-2024-0455
Muhammad, A. U., Murtala, S., & Yusuf, A. (2025). Legal and Regulatory Challenges of Islamic Banking in Africa: Finding a Balance Between Sharia Governance and Regulatory Frameworks. In Legal and Regulatory Aspects of Abrahamic Finance (pp. 67–92). IGI Global Scientific Publishing. https://doi.org/10.4018/979-8-3373-1887-5.ch002
Obadire, A. M., Moyo, V., & Munzhelele, N. F. (2022). Basel III Capital Regulations and Bank Efficiency: Evidence From Selected African Countries. International Journal of Financial Studies, 10(3), 57. https://doi.org/10.3390/ijfs10030057
Olohunlana, A. O., Odeleye, A. T., & Isola, W. A. (2022). Determinants of the intellectual capital efficiency of listed banks in Nigeria: a DEA approach. Journal of Business and Socio-Economic Development, 3(1), 86–96. https://doi.org/10.1108/jbsed-07-2021-0100
Putra, R. N. A., & Al-Banna, H. (2025). Does Maqashid Sharia index boost the stability of Indonesian Islamic banks? Journal of Islamic Accounting and Business Research, 1–21. https://doi.org/10.1108/JIABR-01-2025-0024
Sahyouni, A., Zaid, M. A. A., & Adib, M. (2021). Bank soundness and liquidity creation. EuroMed Journal of Business, 16(1), 86–107. https://doi.org/10.1108/EMJB-04-2019-0061
Simar, L., & Wilson, P. W. (1998). Sensitivity Analysis of Efficiency Scores: How to Bootstrap in Nonparametric Frontier Models. Management Science, 44(1), 49–61. https://doi.org/10.1287/mnsc.44.1.49
Simar, L., & Wilson, P. W. (2007). Estimation and Inference in Two-Stage, Semi-Parametric Models of Production Processes. Journal of Econometrics, 136(1), 31–64. https://doi.org/10.1016/j.jeconom.2005.07.009
Snjawi, S. A. K., & Essa, S. K. (2021). The Role of Liquidity Indicators to Assess Its Risks and Enhance Capital Adequacy in Banking Activity. Journal of Economics and Administrative Sciences, 27(130), 243–255. https://doi.org/10.33095/jeas.v27i130.2218
Sudarwanto, A. S., Kharisma, D. B., & Cahyaningsih, D. T. (2023). Islamic Crowdfunding and Shariah Compliance Regulation: Problems and Oversight. Journal of Financial Crime, 31(4), 1022–1036. https://doi.org/10.1108/jfc-01-2023-0003
Tagkalakis, A., & Kasselaki, M. (2023). Financial Soundness Indicators and Financial Crisis Episodes. SSRN Electronic Journal. https://doi.org/10.2139/ssrn.4182441
Uddin, M. N., Hosen, M., Azad, M. A. K., Günerhan, H., Hoque, N., Uddin, M., & Mamun, A. (2023). Guidelines for Developing the Shari’ah‐compliant Products and Shari’ah Governance for Sustainable Banks in Bangladesh. Business Strategy & Development, 7(1). https://doi.org/10.1002/bsd2.309
Uddin, S., Akhtar, S., Qamar, F., & Mughairi, H. Al. (2025). Dynamics of Technical Efficiency in the Indian Banking Sector: A Metafrontier DEA Approach. Quality & Quantity. https://doi.org/10.1007/s11135-025-02058-1
Ullah, M. (2025). The Future of Islamic Finance: Global Trends, Structural Challenges, and Theoretical Perspectives. Aijss, 4(3), 4723–4746. https://doi.org/10.63056/acad.004.03.0754
Wiwoho, J., Trinugroho, I., Kharisma, D. B., & Suwadi, P. (2023). Islamic Crypto Assets and Regulatory Framework: Evidence From Indonesia and Global Approaches. International Journal of Law and Management, 66(2), 155–171. https://doi.org/10.1108/ijlma-03-2023-0051
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